Vietnam's best badminton player Nguyen Tien Minh has fallen out of the top 10 spots for the first time in more than two years, according to the latest Badminton World Federation (BWF) rankings.

A string of bad results in international competitions recently pushed Tien Minh one place down to 11th position.

This is a disappointing milestone in his career because 29-year-old Minh was among the world's 10 best players from January 21, 2010, and at one point, he was among the top 5.

On Thursday, Minh beat Indian rival Parupalli Kashyap 21-13, 21-18 in 38 minutes in a second round match of the BWF Super Series Swiss Open. Kashyap has also slid one spot to 30th in the latest BWF rankings.

In the third round, Minh will clash with Danish player Hans-Kristian Vittinghus, who has jumped two positions to 15th.

With the 26-year-old Dane in excellent form of late, Minh is expected to have a tough time trying to beat him.